Borla Universal XR-1 Multi-Core Racing Muffler

What you get with this Borla XR-1 Multi-Core Racing Muffler is a universal muffler designed for high-horsepower applications where mufflers are required. It features a 4-inch center inlet and a 4-inch center outlet, with a 6.25-inch round body that's 16 inches long, giving it an overall length of 21 inches. The reversible design offers flexibility during installation, making it easier to fit into your exhaust system.

This muffler is built tough using T-304 stainless steel, which means it won't rust and is constructed to handle the demands of racing. Borla's patented Multicore design is key here; it's engineered to actually flow better than a straight piece of pipe, which is pretty notable. Inside, it uses sound-absorbing stainless steel wool packing to manage sound effectively and prevent burnout, all while maintaining a balance of sound and power that racers rely on. It's also 100% welded for strength.

This is a solid option if you're building a high-performance vehicle and need a muffler that won't restrict your power. It's made in the USA, reflecting Borla's extensive experience in exhaust systems.